>At 01:59 PM 6/17/96 +0100, you wrote:
>
>>> Generally, the 16C57s erase in two to three minutes but I have not timed it
>>> exactly. This is the same with the other 5x devices but NOT so for most of
>>> the 16Cxx devices that can take 10 to 30 minutes depending on the eraser and
>>> over 2 hours if the code protection is "ON."
>
>Really?  I've never had to go longer than 45 seconds with a PIC16C57.  I'm
>using a UltraViolet Products (UVP) eraser, and it seems to work very well.
>Usually I get a complete erase in 30 seconds.  I have gone through many
>erase cycles on a lot of chips, so I don't think it's too hard on the PIC's.
>
>-Todd Peterson
>
Todd,

Well there are erasers and erasers! I have been supprised that PICLISTERS
have quoted times about half of what my eraser takes. I too have "thrashed"
my 16C57 JWs. They are VERY robust and alway program 100% The only cause of
death I have experience with them is a slightly too high Vpp voltage
problem. They don't like this but otherwise they are "TANKS!"

Regards,

Jim